Connect the C# driver to your database

The C# driver supports the vector data type. These instructions are for users connecting to Hyper-Converged Database (HCD).

This example creates a new C# project and configures it to connect to your HCD database. It adds dependencies, connection code, and code to run a CQL query and print the output to the console.

Prerequisite

You have installed a cluster.
You have created a keyspace.
You have installed C#.

Connect to your database

Create a new C# project and configure it to connect to your Cassandra database.
```
mkdir csharpproject
cd csharpproject
dotnet new console
```
Add the dependencies for the C# driver to your project. Latest .
```
dotnet add package CassandraCSharpDriver -v <version>
```

Replace the code in Program.cs with the following code to connect to your HCD database.

Include your credentials in the WithCredentials method call, as shown in the following examples.

using System;
using System.Linq;
using Cassandra;

namespace csharpproject
{
    class Program
    {
        static void Main(string[] args)
        {
            var session =
                Cluster.Builder()
                       .WithCredentials("username", "password")
                       .Build()
                       .Connect();
        }
    }
}

After the connection code, add the following code to the Main method in Program.cs. This code runs a CQL query and prints the output to the console.
```
var rowSet = session.Execute("select * from system.local");
Console.WriteLine(rowSet.First().GetValue<string>("cluster_name"));
```

Run your C# project with the dotnet runtime.

dotnet restore
dotnet build
dotnet run --no-build

Installation and data migration instructions are located in the C# driver quickstart.

Connect the C# driver to your database

Prerequisite

Connect to your database

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